Please note the DLC button on the main menu.
Corvo's Story is evidently just beginning
No it isn't. The developers have confirmed that Corvo's story is over with this version of the game. If there is future DLC it will be with another protagonist.
As to the thread at hand, I don't necessarily agree but I don't disagree either. Right from the start the narrative was the only thing that could suffer. The game's length didn't matter as well since we were expecting a well paced story. We did't get both. I was both disappointed but relieved as well.
With the existence of this game Arkane and Bethesda have shown that they can make the right decisions and that they can push out quality content. The part in which I don't agree is that focusing on the little things was a bad move, it wasn't. I always said that the game was way too rushed and that it releases too soon after a 3 year pre-production period. That is probably why most things lacked depth and everything felt rushed.
All and all, it still has superb gameplay but sadly it's no Deus Ex, no matter how much I wanted it to be and even surpass it.